RAL 820-4 vs Surf
Where RAL 820-4 belongs to RAL Effect's range, Surf is a Tikkurila color. These are both blue-greys, so the question isn't which hue to choose — it's where within blue-grey to land. RAL 820-4 (LRV 23) reflects noticeably more light than Surf (LRV 20), a difference of 3 points that becomes especially apparent in rooms with limited natural light. The ΔE 4.4 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
RAL 820-4 vs Surf Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 820-4 on one side and Surf on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More RAL 820-4 comparisons
See how RAL 820-4 stacks up against other well-photographed colors across different brands and tones.
